The thermal dissociation of equilibrium of $NaN{O}_3\left(s\right)$  is studied under different conditions.
  $2NaN{O}_3\left(s\right)\rightleftharpoons 2NaN{O}_2\left(s\right)+O_2\left(g\right)$
For the equilibrium, the correct statement(s) is/are

$\Delta H$ of  a reaction depends on temperature and is given by Kirchoff’s equation.
 $K_c=\left[O_2\right]$
$K_p=p{O}_2$ which can have only one value at a particular temperature.
Catalyst does not change the energy of the reactant or product.